🔋 Portable charger (wired)

Nothing at all — a wired portable charger without a built-in battery is just a cable and adapter, so it has no restrictions and will pass through security without a second glance. There are no lithium battery rules that apply to it, and it will not be flagged on the X-ray.

No, and this distinction matters. A wired portable charger — meaning a charging cable and wall adapter — contains no battery, so none of the lithium battery restrictions that apply to power banks are relevant. If your device has a built-in battery, it is a power bank and different rules apply. A simple cable and plug is unrestricted in carry-on and checked baggage everywhere.

It is possible if the charger has an unusual shape or multiple components that look complex on the X-ray, but this is uncommon. Standard USB-A or USB-C wall chargers and cables are familiar items to screeners worldwide and will not prompt additional inspection. Being able to take it out of your bag quickly is the most you need to prepare.

Since there are no restrictions either way, carry it wherever it is most useful to you. If you want to charge your phone during the flight or layover, keeping the cable and adapter in your carry-on makes the most sense. Packing it in checked baggage is also fine — unlike a power bank, there are no rules requiring it to stay in the cabin.